... Oscilloscope: 1.DC-40MHz,dual channel color display 2.1GS/s real sample,50GS/s ... Oscilloscope,DS-2040CA Digital Oscilloscope,dual channel,color dispaly,40Mhz bandwidth.Specifications: SpecificationsDS-2040CAChannels 2 ... modesAuto, normal, singleTrigger sourcesCH1, CH2, Ext, Ext/5, Ext(50Ω)Horizontal accuracy ±0.01%Vertical sensitivity2 ... digital oscilloscope,40Mhz bandwidth,color display,dual channel